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A pure nucleonic equation of state (EoS) for beta equilibrated charge neutral neutron star (NS) matter is determined using density dependent effective NN interaction. This EoS is found to satisfy both the constraints from the observed…

Nuclear Theory · Physics 2011-05-11 Partha Roy Chowdhury

The difficulty in describing the equation of state (EoS) for nuclear matter at densities above the saturation density ($\rho_0$) has led to the emergence of a multitude of models based on different assumptions and techniques. These EoSs,…

Nuclear Theory · Physics 2024-01-17 Ameya Thete , Kinjal Banerjee , Tuhin Malik

The thermodynamic relation between pressure and density (i.e. the equation of state) of cold supranuclear matter is critical in describing neutron stars, yet it remains one of the largest uncertainties in nuclear physics. The extraction of…

General Relativity and Quantum Cosmology · Physics 2022-03-11 Zack Carson , Katerina Chatziioannou , Carl-Johan Haster , Kent Yagi , Nicolás Yunes

We investigate the impact of the neutron-skin thickness Delta(R) on the energy difference between the anti-analog giant dipole resonance (AGDR), E(AGDR), and the isobaric analog state (IAS), E(IAS), in a heavy nucleus such as 208Pb. For…

Nuclear Theory · Physics 2015-10-28 L. G. Cao , X. Roca-Maza , G. Colo' , H. Sagawa

We construct posterior distributions of the equation of state (EoS) for matter beyond the inner crust of neutron stars by incorporating finite nuclei (FN) constraints within relativistic mean field models. These constraints are implemented…

Nuclear Theory · Physics 2026-01-21 Anagh Venneti , Sarmistha Banik , Bijay K Agrawal

We discuss the results of 3D simulations of tidal disruptions of white dwarfs by moderate-mass black holes as they may exist in the cores of globular clusters or dwarf galaxies. Our simulations follow self-consistently the hydrodynamic and…

Astrophysics · Physics 2009-07-22 S. Rosswog , E. Ramirez-Ruiz , W. R. Hix

We review the experimental knowledge on the dipole polarizability (DP) of nuclei and its relation to the neutron skin thickness and properties of the neutron-rich matter equation of state (EOS). The discussion focuses on recent experiments…

Nuclear Experiment · Physics 2025-07-08 P. von Neumann-Cosel , A. Tamii

The equation of state (EoS) of neutron matter plays a decisive role to understand the neutron star properties and the gravitational waves from neutron star mergers. At sufficient densities, the appearance of hyperons generally softens the…

Nuclear Theory · Physics 2025-02-21 Hui Tong , Serdar Elhatisari , Ulf-G. Meißner

In this work, we investigate neutron stars (NSs) in the strong field regime within the framework of symmetric teleparallel $f(Q)$ gravity, considering three representative models: linear, logarithmic, and exponential. While Bayesian studies…

General Relativity and Quantum Cosmology · Physics 2026-02-19 Sneha Pradhan , N. K. Patra , Kai Zhou , P. K. Sahoo

In recent years our understanding of the dense matter equation of state (EOS) of neutron stars has significantly improved by analyzing multimessenger data from radio/X-ray pulsars, gravitational wave events, and from nuclear physics…

High Energy Astrophysical Phenomena · Physics 2021-09-28 G. Raaijmakers , S. K. Greif , K. Hebeler , T. Hinderer , S. Nissanke , A. Schwenk , T. E. Riley , A. L. Watts , J. M. Lattimer , W. C. G. Ho

Based on the basic definition of Fermi energy of degenerate and relativistic electrons, we obtain a special solution to electron Fermi energy, $E_{\rm F}(e)$, and express $E_{\rm F}(e)$ as a function of electron fraction, $Y_{e}$, and…

High Energy Astrophysical Phenomena · Physics 2016-03-09 Xing Hu Li , Zhi Fu Gao , Xiang Dong Li , Yan Xu , Pei Wang , Na Wang , Jianping Yuan

We present a minimal nuclear energy density functional (NEDF) called "SeaLL1" that has the smallest number of possible phenomenological parameters to date. SeaLL1 is defined by 7 significant phenomenological parameters, each related to a…

Nuclear Theory · Physics 2018-05-11 Aurel Bulgac , Michael McNeil Forbes , Shi Jin , Rodrigo Navarro Perez , Nicolas Schunck

The effects of the existence of exotic nuclear shapes at the bottom of the neutron star inner crust - nuclear `pasta' - on observational phenomena are estimated by comparing the limiting cases that those phases have a vanishing shear…

Solar and Stellar Astrophysics · Physics 2015-05-28 M. Gearheart , W. G. Newton , J. Hooker , Bao-An Li

In this work, we reinvestigate the electron fraction $Y_{e}$ and electron Fermi energy $E_{F}(e)$ of neutron stars, based on our previous work of Li et al.(2016), in which we firstly deduced a special solution to $E_{F}(e)$, and then…

High Energy Astrophysical Phenomena · Physics 2018-01-10 Zhi-Fu Gao , Xiangdong Li , Hao Shan , Wei Wang , Na Wang

Using the Dirac-Brueckner-Hartree-Fock (DBHF) approach including the hyperon degrees of freedom, we investigate the properties of neutron-star matter. To handle the hyperons in matter, we first examine the importance of the space part of…

Nuclear Theory · Physics 2014-10-28 Tetsuya Katayama , Koichi Saito

We calculate the energy per particle of symmetric nuclear matter and pure neutron matter using the microscopic many-body Brueckner-Hartree-Fock (BHF) approach and employing the Argonne V18 (AV18) nucleon-nucleon (NN) potential supplemented…

Nuclear Theory · Physics 2015-02-05 Domenico Logoteta , Isaac Vidaña , Ignazio Bombaci , Alejandro Kievsky

A set of equations of state obtained from finite-range Gogny forces and momentum-dependent interactions is used to investigate the recent observation of gravitational waves from the binary neutron star merger GW170817 event. For this set of…

Nuclear Theory · Physics 2021-02-16 O. Lourenço , M. Bhuyan , C. H. Lenzi , M. Dutra , C. Gonzalez-Boquera , M. Centelles , X. Viñas

The observation of the gravitational wave signal GW170817, consistent with emission from the inspiral of a binary neutron-star system, provided information on the tidal deformation of the participating stars. The available data may be…

Nuclear Theory · Physics 2020-05-06 Andrea Sabatucci , Omar Benhar

Photon strength functions describing the average response of the nucleus to an electromagnetic probe are key input information in the theoretical modelling of nuclear reactions. Consequently they are important for a wide range of fields…

The detection of the GW170817 neutron star merger event has incited an intense research activity towards the understanding of the nuclear matter equation of state. In this paper we compare in particular the pressure-density relation…

Nuclear Theory · Physics 2019-07-09 G. F. Burgio , A. Figura , H. -J. Schulze , J. -B. Wei